Why do I get hives on my arms and behind my knee when I run?

hives you really should maintain an eye on: issue of : Why do I get hives on my arms and behind my knees following running Given that I have a sunburn last summer, when I start my day, I hives behind my knees. I do my running indoors on a treadmill. Why am I very best answer hives: response by the conservative Hives can occur, by welding or heat. Also friction. Hives are itchy red welts. If you have an itchy red, scaly rash but flat and rather of thinking with eczema. If they try,

Itching Urticarial Rash